高等学校化学学报

高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (9): 1185.

• 研究论文 •    下一篇

超导核磁共振研究金属卟啉与配体交换动力学

朱志昂, 郭福春, 阮文娟, 陈荣悌   

  1. 南开大学化学系, 天津 300071
  • 收稿日期:1992-11-19 修回日期:1993-02-20 出版日期:1993-09-24 发布日期:1993-09-24
  • 通讯作者: 朱志昂
  • 作者简介:第一作者:男, 53岁, 教授.
  • 基金资助:

    北京分子动态及稳态结构国家重点实验室、中科院武汉物理所波谱与原子分子物理国家重点实验室基金

Studies on the Exchange Kinetics of Metal loporphyrin with a Series of Imidazoles by NMR Method

ZHU Zhi-Ang, GUO Fu-Chun, RUAN Wen-Juan, CHEN Rong-Ti   

  1. Department of Chemistry, Nankai University, Tianjin, 300071
  • Received:1992-11-19 Revised:1993-02-20 Online:1993-09-24 Published:1993-09-24

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摘要： 用超导核磁共振研究了4种咪唑配体与金属卟啉铁(Ⅲ)和锰(Ⅲ)配位的交换反应动力学.探讨了不同轴向配体对同一金属卟啉、金属卟啉环上取代基、不同金属离子以及温度等因素对交换反应动力学的影响,进一步验证了线性热力学函数关系的存在.

关键词: 金属卟啉, 核磁共振, 交换反应, 轴向配位反应

Abstract: The exchange rates of axially coordinated imidazoles in mono-ligated iron (Ⅲ) and manganese(Ⅲ) complexes of synthetic porphyrins such as tetraphenylporphyrin (TPP) and te-tramesitylporphyrin(TMP) were measured by NMRmethod.The exchange rate constants and activated parameters were obtained.Two exchange reaction mechanisms were proposed.The influences of metallic ions and temperature on the exchange rates were compared.These results were explained reasonably.The linear relationship of the kinetic parameters was verified.

Key words: Metalloporphyrin, Nuclear magnetic resonace, Exchange reaction, Axial coordination reaction

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